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IEC 62208 Edition 2.0 2011-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Empty

IEC 62208 Edition 2.0 2011-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Empty enclosures for low-voltage switchgear and controlgear assemblies – General requirements Enveloppes vides destinées aux ensembles d'appareillage à basse tension – Exigences générales INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE S ICS 29.130.20 PRICE CODE CODE PRIX ISBN 978-2-88912-661-3 ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale ® This is a preview - click here to buy the full publication – 2 – 62208 © IEC:2011 CONTENTS FOREWORD ........................................................................................................................... 4 1 Scope ............................................................................................................................... 6 2 Normative references ....................................................................................................... 6 3 Terms and definitions ....................................................................................................... 7 4 Classification .................................................................................................................... 8 5 EMC requirements ............................................................................................................ 8 6 Information to be given regarding the enclosure ............................................................... 9 6.1 General ................................................................................................................... 9 6.2 Marking ................................................................................................................... 9 6.3 Documentation ........................................................................................................ 9 6.3.1 General ....................................................................................................... 9 6.3.2 Dimensions ................................................................................................. 9 6.3.3 Mounting arrangements ............................................................................. 10 6.3.4 Permissible loads ...................................................................................... 10 6.3.5 Lifting and transport support ...................................................................... 10 6.3.6 Protective circuit ........................................................................................ 10 7 Service conditions .......................................................................................................... 10 7.1 General ................................................................................................................. 10 7.2 Normal service conditions ..................................................................................... 10 7.2.1 Ambient air temperature ............................................................................ 10 7.2.2 Humidity conditions ................................................................................... 11 7.3 Special service conditions ..................................................................................... 11 7.4 Conditions during transport and storage ................................................................ 11 8 Design and construction ................................................................................................. 11 8.1 General ................................................................................................................. 11 8.2 Static loads ........................................................................................................... 12 8.3 Lifting and transport support .................................................................................. 12 8.4 Access to the interior of the enclosure ................................................................... 12 8.5 Protective circuit.................................................................................................... 12 8.6 Dielectric strength ................................................................................................. 12 8.7 Degree of protection (IK code) ............................................................................... 12 8.8 Degree of protection (IP code) ............................................................................... 13 9 Type tests ...................................................................................................................... 13 9.1 General ................................................................................................................. 13 9.2 General conditions of tests .................................................................................... 13 9.3 Marking ................................................................................................................. 14 9.4 Static loads ........................................................................................................... 14 9.5 Lifting .................................................................................................................... 14 9.6 Axial loads of metal inserts .................................................................................... 15 9.7 Degree of protection against external mechanical impacts (IK code) ..................... 15 9.8 Degree of protection (IP code) ............................................................................... 16 9.8.1 Degree of protection against access to hazardous parts and against the ingress of solid foreign objects indicated by first characteristic numeral ..................................................................................................... 16 9.8.2 Degree of protection against ingress of water as indicated by second characteristic numeral ............................................................................... 16 This is a preview - click here to buy the full publication 62208 © IEC:2011 – 3 – 9.8.3 Degree of protection against hazardous parts as indicated by additional letter .......................................................................................... 17 9.9 Properties of insulating materials .......................................................................... 17 9.9.1 Thermal stability ........................................................................................ 17 9.9.2 Resistance to normal heat ......................................................................... 17 9.9.3 Resistance to abnormal heat and to fire ..................................................... 17 9.10 Dielectric strength ................................................................................................. 18 9.10.1 General ..................................................................................................... 18 9.10.2 Preconditioning.......................................................................................... 19 9.10.3 Enclosures without metal elements inside the protected space .................. 19 9.10.4 Enclosures having metal elements inside the protected space ................... 19 9.10.5 Results to be obtained ............................................................................... 19 9.11 Continuity of the protective circuit.......................................................................... 19 9.12 Resistance to ultra-violet (UV) radiation ................................................................ 20 9.13 Resistance to corrosion ......................................................................................... 20 9.13.1 General ..................................................................................................... 20 9.13.2 Test procedure .......................................................................................... 20 9.13.3 Results to be obtained ............................................................................... 21 9.14 Thermal power dissipation capability ..................................................................... 21 Bibliography .......................................................................................................................... 22 Table 1 – Number of samples to be tested and order of test per sample ............................... 13 Table 2 – Axial loads of metal inserts.................................................................................... 15 This is a preview - click here to buy the full publication – 4 – 62208 © IEC:2011 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ EMPTY ENCLOSURES FOR LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES – GENERAL REQUIREMENTS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62208 has been prepared by subcommittee 17D: Low-voltage switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and controlgear. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technical revision and includes the following significant technical changes with respect to the last edition: – consideration of the restructured series of standards IEC 61439; – alignment of test procedures with the newest relevant standards. This is a preview - click here to buy the full publication 62208 © IEC:2011 – 5 – The text of this standard is based on the following documents: FDIS Report on voting 17D/442/FDIS 17D/447/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended. This is a preview - click here to buy the full publication – 6 – 62208 © IEC:2011 EMPTY ENCLOSURES FOR LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES – GENERAL REQUIREMENTS 1 Scope This International Standard applies to empty enclosures, prior to the incorporation of switchgear and controlgear components by the user, as supplied by the enclosure manufacturer. This standard specifies general definitions, classifications, characteristics and test requirements of enclosures to be used as part of switchgear and controlgear assemblies (e.g. in accordance with the IEC 61439 series), the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c., and suitable for general use for either indoor or outdoor applications. NOTE 1 Additional requirements may apply for specific applications. NOTE 2 The United States of America (USA) uses enclosure “Type” designations according to NEMA 250. The NEMA Enclosure Type designations specify additional environmental requirements for conditions such as corrosion, rust, icing, oil, and coolants. For this reason, the IEC Enclosure Classification Designations IP are used with an enclosure Type designation number appropriate for these markets. This standard does not apply to enclosures, which are covered by other specific products standards (e.g. IEC 60670 series). Compliance with the safety requirements of the applicable product standard is the responsibility of the assembly manufacturer. NOTE 3 This standard may serve as a basis for other technical committees. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat IEC uploads/s1/iec-62208.pdf